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4 June 2010 Single and dual wavelength pumped composite chalcogenide-tellurite microstructured fiber parametric amplifier
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We present the simulation results of the optical parametric amplification in the composite chalcogenide-tellurite microstructured fiber driven by a single wavelength. Further, by applying dual pumping scheme, with two equal power pumps with different wavelengths, lying on opposite sides of the zero dispersion wavelength (ZDWL), we achieve a relatively flat gain spectrum over a wider bandwidth than that possible for single pump. The two pumps in the dual pumping scheme have the power half that of the pump power in single pumping scheme. The composite microstructured fiber designed here not only shows zero dispersion in the telecommunication band but also has two ZDWLs (one in the telecommunication band at 1.51 μm and the other at 2.19 μm) with anomalous dispersion between the two ZDWLs. In addition, the composite fiber has high nonlinearity (of the order of 16 W-1m-1). With a single pump at the first ZDWL, 1.51 μm, the parametric gain over more than 1000 nm wide wavelength band, starting from 1.14 to 2.21 μm, is achieved with a 11.13 dB gain difference between the gains near the pump and optimal wavelengths. In the dual pumping scheme, the difference between the gains at optimal wavelengths and pump wavelength is only 2.45 dB; while the difference between the maximum and minimum gain is 3.43 dB. The maximum value of the gain at the optimal wavelengths, in both single pumping and dual pumping schemes are same. We further show that by selecting proper pump wavelengths ultra-broadband gain can be achieved.
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Chitrarekha Chaudhari, Takenobu Suzuki, and Yasutake Ohishi "Single and dual wavelength pumped composite chalcogenide-tellurite microstructured fiber parametric amplifier", Proc. SPIE 7728, Nonlinear Optics and Applications IV, 77281O (4 June 2010);

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